Validating phone number with country code for (Twilio)

1

Greetings, I am trying to build a regex that checks whether or not a phone number is formatted correctly for Twilio.

validates_format_of :phone_number, :with => …
If the format is incorrect, Twilio is unable to send back the api response to the correct conversation record. Does anyone know how to build a regex that follows this format +11235666666?

2

What is the format? + followed by 11 digits?

2.7.1 :001 > re = /\+\d\d\d\d\d\d\d\d\d\d\d/
2.7.1 :002 > "+11235666666" =~ re
 => 0 
2.7.1 :003 > "11235666666" =~ re
 => nil 
2.7.1 :004 > "11235666" =~ re
 => nil 
2.7.1 :005 > "+11235666" =~ re
 => nil

If you have other constraints, replace the relevant \d with the required value/range.

3

Very nice. Thank you.